Head-rest for chairs.



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Patented May 2|, 190i.

F BITTER HEAD REST FOR CHAIRS.

(Application filed June 18, 1900.

(No Model.)

Li 1 x Wibwema r cams PETERS 00'. more LTHO wAsnms n n c No. 674,565. Patented May 2|, l90l.

F BITTER HEAD BEST FOR CHAIRS.

(Application filed. June 18, 1900.)

3 Sheats Sheet 2,

W0 Model.)

No. 674,565. Patented May 2|, l90l.

' F. BITTER.

HEAD BEST FOR CHAIRS.

(Appliution filed June 18, 1900.) (No Model.) 3 Sheets-Sheet 3.

FRANK RITTER, OF ROCHESTER, NEW YORK.

HEAD-REST FOR CHAIRS.

SPECIFICATION forming part of Letters Patent No. 674,565, dated May 21, 1901.

Application filed June 18, 1900. serial No. 20,704. (No model.)

To all whom it may concern:

Be it known that I, FRANK RITTER, a resident of Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Head-Rests for Chairs; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use the same.

The invention relates to head-rests and head-rest supports for chairs and the like of that class that have adjacent handles for operating a head-rest lock and an independent head-rest-support lock, and has for its object to provide simple and efficient means for looking a head-rest and head-rest support.

The invention consists in the construction herein described and pointed out.

In the accompanying drawings, Figure 1 is a longitudinal section of a head-rest and its supporting parts. Fig. 2 is a partial longitudinal section in a transverse plane. Fig. 3 comprises perspectives of two head-restlocking wedges or blocks. Fig. 4 is an eleva tion of a screw that mediately operates the wedges. Fig. 5 is a perspective of a sleeve having an inclined part to cooperate with the wedges. Fig. 6 is a perspective of a sleeve to hold the screw against rotation. Fig. 7 is a handle to cooperate with the screw. Fig. 8 is an elevation of head-rest pads, pad-supporting bar, and the ball of a universal joint. Fig. 9 is a partial enlarged section on line 9 9 of Fig. 1. Fig. 10-is an enlarged section on line 10 10 of Fig. 9. Fig. 11 is a section on line 11 ll of Fig. 2. Fig. 12 is a section on line 12 12 of Fig. 11, the guide-bar being omitted. Fig. 13 is a partial elevation of a locking-rod. Fig. 14: comprises a partial plan and a partial side elevation of a head-restlocking handle showing a handle-stop. Fig. 15 is a central longitudinal section of a headrest-support-locking device. Fig. 16 is a section on line 16 16 of Fig. 15. Fig. 17 is a section on line 17 17 of Fig. 15. Fig. 18 is a perspective of a lockng-plug.

Numeral 1 denotes a guide-block to be connected in any suitable manner to a chairback. This block may have exterior guidingribs, as shown in Fig. 11, adapted for adjust- -ment in corresponding grooves in a chairback frame in usual manner, and 1 denotes a portion of a spring to obviate jar when the block descends to its lowest limit. This, however, constitutes no part of the present improvement. Said block is approximately U- shaped in cross-section and has ways 2 to receive ribs 3 on a sliding bar 4, which sustains the head-rest. The ribs, which are interrupted about their mid-length, as indicated in Figs. 2, 11, and 12, do not in the present instance extend to the ends of the guide-block 1, but stop short of said ends, as indicated by dotted lines in Fig. 2. The grooves extend to the upper end of the block to provide for the insertion of the ribs in assembling the parts. The bar 4 may be similar in form to the guide-block and contains a rotatable rod or member 5, held in a normal situation bya spring 6, fixed to the rod and bar. The said bar has alongitudinal slot 7 to permit sides to be spread to cause ribs 3 to be jammed in the ways 2 by means of the cam-faces 8 or. a rod or like member 5, which cam-faces are normally forced by spring6 against the ends 'of screws 9, adj ustably fixed in the bar sides,

which action crowds apart the bar sides and locks the bar in the guide-block. The rod turned to unlock the bar by a handle 10, situ, ated adjacent the handle which looks the head-rest.

9 denotes screws working in the parts 4? of the slotted bar to bind the screws 9 in place when properly adjusted. These screws provide regulable bearings for the camfaces 8. Said parts 4;, separated by slot 7, complete a-housing for the cam portion of rod 5 and act as a stop for the rod-enlargement 5". This enlargement is convenient for the suitable attachment of the spring 6, which normally tends to rotate rod 5 and force its faces 8 against screws 9, with the effect to spread bar 4 and look its ribs in the grooves of the guide block or bar 1. The spring holds enlargement 5 against the lower ends of the parts 4: of the bar 4, and said enlargement prevents the upward movement of the rod 5. By this means all danger of interference or friction between the handles 10 and 11 is obviated. Said handles are situated adjacent each other and being of the form and arrangement set forth are adapted for either successive or simultaneous manipulation. It is characteristic of this part of the improvement that the headrest support is locked to the back by devices movable transversely of the back and the head-rest look by devices movable endwise with respect to the back and that such devices are capable of independent operation i and also of simultaneous operation without interference or friction between the two looking constructions.

The rod 5 has a stop-pin 5 to limit its movement when turned by handle and prevent the overrunning of the cam-faces.

The handles 10 and 11 are situated in a recess 12, formed in the head 13 of the slide-bar.

To raise or lower the head-rest and its sliding-bar support 4, the tension of spring 6 is overcome by the use of handle 10, and the slotted bar collapses sufficiently to permit its ribs to slide freely in the guideways 2, whereupon the bar and the head-rest supported thereby can be moved up or down. The release of the handle permits the spring to retate the cam-rod and lock the bar and its guide. Obviously thelocking and unlocking movements of the parts will be small.

said cover and its contained socket-block 19. This part of the construction is well known and needs no detailed description.

18 denotes a headed screw-bolt connecting.

cover with the handle 11.

20 denotes a sleeve fixed to the slide-bar head 13 by a screw 21. This sleeve has slots 22 to receive pins 23, fixed to the screw 18 to prevent the rotation of the screw when the handle is screwed up or down upon it.

24 denotes a sleeve provided with an in clined portion 25, which incline or wedge is crowded against the proximate wedge 14, 5 when the handle 11 is suitably turned to draw I down the screw 18 and its connected cover 15, and thus crowd its inclosed wedge 14 against the wedge or incline 25 of said sleeve 24. By this operation the latter wedge moves the wedge l4,'which forces its farther end against a wedge 26 on a bolt 27, with the eifect to draw down the bolt and the connected cover and clamp the ball 16 in its socket, situated in and between the said cover and its contained socket-block.

28 is a spring which when the handle is reversed overcomes the friction of the parts and loosens them, so that the parts of the headed therein by the spring 6 through the medium of the rod 5 and the adjustable screws 9 and to be released by the rotation of the cam-rod 5 overcoming the tension of the spring, as in the other modification.

The spring may be fastened to the rod and bar directly or mediately. In the present instance it is fixed to the bar by means of a tension-adjustingplug 34, ordinarily held'in the bar by a set-screw.

The rod is turned to overcome the spring and release the bar by handle 10, having an extension 10 to engage the wall of the recess 12 in the bar-head 13.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The com bination of achair-back, a headrest support, an adjustable head-rest, devices for locking and unlocking said rest, a cam to lock the support and back together, means to normally hold the parts locked, a device to rotate the cam and render its faces inoperative and unlock the parts, a separate handle for each unlocking device, said handles being The head-rest lock com prises a wedge-block 1 14, suitably supported in a case or cover 15 and the whole adapted to clamp a cover 15 against the ball 16 of a universal joint con- I necting the head-rest-pad-holding bar 17 with adjacent whereby the unlocking devices can be operated separately or simultaneously at will.

2. The combination of a chair-back, a headrest support, an adjustable head-rest, devices for locking and unlocking said rest, a rotatable member, a cam situated on said memher to lock the support and back together, a device to rotate the cam and render its faces inoperative and unlock the parts, a separate handle for each unlockingdevice, said handles being adjacent whereby the unlocking devices can be operated separately or simultaneously at will, and means for preventing the endwise movement of said cam-supporting member in the head-rest support.

8. The combination of achair-back, a headrest support, an adjustable head-rest, devices for locking and unlocking said rest, a rotatable member, a cam situated on said member to lock the support and back together, a device to rotate the cam and render its faces inoperative and unlock the parts, said unlocking devices consisting of adjacent handles operative separately or simultaneously at will, and means for preventing the endwise movement of said cam-supporting memher in the head-rest support.

4. The combination of a chair-back, a headrest support, a cam situated on a rotatable member to lock the support and back together, said member, means to normally hold the parts looked, a device to rotate the cam and render its faces inoperative and unlock the parts, means for preventing the endwise movement of said cam-supporting member in the support, said device for rotating the cam consisting of a handle fixed directly to the member, and a stop on the member to prevent overrunning of the cam.

5. An adjustable head-rest, a head-rest support, a chair-back holding the support, a

locking device for the rest movable en'dwise with respect to the support, a transverselymovable locking device for the support, and independent adjacent lock-operating handles connected to the respective locking devices, both of said handles being adapted to move in planes transverse to the support to move the said locking devices, and each operative either separately or simultaneously with the other at will.

6. The combination of a chair-back provided with a block having ways for ribs on a sliding head-rest support, a slotted bar constituting said support having ribs movable in said ways, a rotating member provided with a cam, a spring normally turning the cam between the members of the slotted bar to spread the same and lock it in the support, and a handle fixed to said member.

7. A head-rest support adapted to be movably connected to a chair-back, said back, a

rotating member within the support and having a cam to lock the support and back together, and regulable cam-bearings between the said member and the support.

8. A head-rest support adapted to be movably connected to a chair-back, said back, a rotating-member Within the support and having a cam to lock the support and back together, regulable cam-bearings between the said member and the support, and means for locking said bearings.

9. A head-rest, a head-rest support consisting of a slide-bar having a head recessed to receive actuating-handles, a chair-back holding the support, a locking device for the rest, a device to lock the support to the back, and independent handles separately connected to the respective locking devices and situated adjacent each other in said recess.

10. The combination of a chair-back, a head rest support consisting of a hollow slotted bar movable in said back, a rotating member situated within the hollow bar and provided with a cam to spread the bar, and

devices for preventing the independent endwise movement of said bar.

11. A chair-back, a hollow head-rest support movable lengthwise in said back, a rotating locking member situated within said support and provided with a cam, and a screw transversely adjustable in the support to cooperate with the cam to lock the support and back together.

12. A chair-back, a hollow head-rest support movable lengthwise in said back, a rotating locking member situated Within said support and provided with a cam, a screw transversely adjustable in the support to cooperate With the cam to lock the support and back together, and a spring to efiect the locking.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

G. WILLARD RICH, CHARLES W. FERTIG. 

